Thermochemical Equation Determine Mass

  • #1
So I am doing practice problems from the text book and it states:

Given the thermochemical equation: 2Cu2O(s) → 4Cu(s) + O2, ΔH =+333.8 kJ/mol, calculate the mass of copper produced when 1.47 x 104 kJ is consumed in this reaction

My attempt

(1.47 x 104 kJ)/(33.8 kJ/mol )= 44 mol x 2 2 60=5.284 kg
BUT This is wrong and I dont know why...the answer is 11.2 kg
 

Answers and Replies

  • #2
Borek
Mentor
28,632
3,105
No idea what you did, what is "2 2 60"?

It is 333.8 kJ per "mole of reaction", not "mole of copper".
 

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